Tuning of activity and selectivity of Ni/(Al)SBA-15 catalysts in naphthalene hydrogenation

Vargas-Villagrán, H.; Ramírez-Suárez, D.; Ramírez-Muñoz, G.; Calzada, Lina A.; González‐García, Gerardo; Klimova, Tatiana

doi:10.1016/j.cattod.2019.09.018

Cited by 19 publications

(12 citation statements)

References 40 publications

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“…Low temperature and high pressure in principle favor the reaction moving toward the generation of decalin. [40][41] As depicted in Figure S9a, naphthalene was quickly converted to tetralin initially, then some tetralin was converted to decalin. With the reaction going on, the concentration of tetralin quickly reached a maximum at 25 min, then decreased gradually.…”

Section: Reaction Kineticsmentioning

confidence: 99%

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Deep Hydrogenation Saturation of Naphthalene Facilitated by Enhanced Adsorption of the Reactants on Micro‐Mesoporous Pd/HY

Wang

Zhang

et al. 2021

ChemistrySelect

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Deep hydrogenation saturation of polycyclic aromatic hydrocarbons is of great importance for the production of valuable chemical products, but is hard due to the presence of hardly broken π bond. In this work, micro-mesoporous HY supported Pd catalysts (Pd/HY-a) have been prepared by a simple impregnation method following alkali treatment of pristine HY zeolite, which exhibited superior performance for the deep hydrogenation saturation of naphthalene. Pd/HY-a was systematically characterized and compared with the Pd catalysts supported on pristine HY, ZSM-5, SBA-15, and Al 2 O 3 . In Pd/HY-a, abundant mesoporous pore channels together with suitable B acid sites greatly facilitate the adsorption of the reactants (naphthalene and tetralin) and properly tune the electron state of loaded Pd. Therefore, efficient deep hydrogenation saturation of naphthalene has been achieved on Pd/HY-a. Moreover, the kinetic behaviors of naphthalene hydrogenation on Pd/HYa were preliminarily investigated, in which the first-order kinetic model fitted the experimental data well in the early reaction stage.

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Section: Reaction Kineticsmentioning

confidence: 99%

“…(2-4). [41] Figure 6 depicts the fitting of the reaction data catalyzed by Pd/HY-a (Figure 6a) and Pd/Al 2 O 3 (Figure 6b) at 260°C by the kinetic model. On Pd/ Al 2 O 3 , the overall fitting of the kinetic data was pretty good by the first-order model.…”

Section: Reaction Kineticsmentioning

confidence: 99%

Deep Hydrogenation Saturation of Naphthalene Facilitated by Enhanced Adsorption of the Reactants on Micro‐Mesoporous Pd/HY

Wang

Zhang

et al. 2021

ChemistrySelect

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“…The semi-empirical kinetic models of HDS and HYD were calculated according to the mechanism presented in the Schemes 1 and 2 [52,53], respectively. All the reactions were assumed irreversible due to the excess of hydrogen (considered constant), whereby the reactions are considered of the pseudo-first-order.…”

Section: Catalytic Testmentioning

confidence: 99%

Effect of the Gallium and Vanadium on the Dibenzothiophene Hydrodesulfurization and Naphthalene Hydrogenation Activities Using Sulfided NiMo-V2O5/Al2O3-Ga2O3

2020

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The effect of Ga and V as support-modifier and promoter of NiMoV/Al2O3-Ga2O3 catalyst on hydrogenation (HYD) and hydrodesulfurization (HDS) activities was studied. The catalysts were characterized by elemental analysis, textural properties, XRD, XPS, EDS elemental mapping and High-resolution transmission electron microscopy (HRTEM). The chemical analyses by X-ray Fluorescence (XRF) and CHNS-O elemental analysis showed results for all compounds in agreement, within experimental accuracy, according to stoichiometric values proposed to Mo/Ni = 6 and (V+Ni)/(V+Ni+Mo) = 0.35. The sol-gel synthesis method increased the surface area by incorporation of Ga3+ ions into the Al2O3 forming Ga-O-Al bonding; whereas the impregnation synthesis method leads to decrease by blocking of alumina pores, as follows NiMoV/Al-Ga(1%-I) < NiMoV/Al-Ga(1%-SG) < NiMo/Al2O3 < Al2O3-Ga2O3(1%-I) < Al2O3-Ga2O3(1%-SG) < Al2O3, propitiating Dp-BJH between 6.18 and 7.89 nm. XRD confirmed a bulk structure typical of (NH4)4[NiMo6O24H6]•5H2O and XPS the presence at the surface of Mo4+, Mo6+, NixSy, Ni2+, Ga3+ and V5+ species, respectively. The EDS elemental mapping confirmed that Ni, Mo, Al, Ga, V and S are well-distributed on Al2O3-Ga2O3(1%-SG) support. The HRTEM analysis shows that the length and stacking distribution of MoS2 crystallites varied from 5.07 to 5.94 nm and 2.74 to 3.58 with synthesis method (SG to I). The results of the characterization sulfided catalysts showed that the synthesis method via impregnation induced largest presence of gallium on the surface influencing the dispersion V5+ species, this effect improves the dispersion of the MoS2 phase and increasing the number of active sites, which correlates well with the dibenzothiophene HDS and naphthalene HYD activities. The dibenzothiophene HDS activities with overall pseudo-first-order rate constants’ values (kHDS) from 1.65 to 7.07 L/(h·mol·m2) follow the order: NiMoV-S/Al-Ga(1%-I) < NiMo-S/Al2O3 < NiMoV-S/Al-Ga(1%-SG), whereas the rate constants’ values (k) of naphthalene HYD from 0.022 to 2.23 L/(h·mol·m2) as follow: NiMoV-S/Al-Ga(1%-SG) < NiMo-S/Al2O3 < NiMoV-S/Al-Ga(1%-I). We consider that Ga and V act as structural promoters in the NiMo catalysts supported on Al2O3 that allows the largest generation of BRIM sites for HYD and CUS sites for DDS.

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“…Catalysts based on noble metals such as Pt, Pd, Rh, and Ru supported on different materials have been investigated in HDO of different model compounds, obtaining high yields of hydrocarbons. − Nickel-based catalysts are an alternative to noble metals, primarily due to their lower cost and high activity. ,, On the other hand, different kinds of ordered mesoporous materials, such as MCM-41, SBA-15, SBA-16, KIT-6, and others, have garnered significant attention as supports for heterogeneous catalysts. − In the field of HDO of bio-oil model compounds, the use of different Ni catalysts supported on SBA-15-type materials has been reported in the literature. For instance, hydrotreating of a mixture of methyl esters was conducted over Ni and Co catalysts supported on SBA-15 and Al-SBA-15 .…”

Section: Introductionmentioning

confidence: 99%

Boosting the Hydrodeoxygenation Activity and Selectivity of Ni/(M)-SBA-15 Catalysts by Chemical Alteration of the Support

Calzada,

Pérez-Estrada,

Sánchez-Ramírez

et al. 2023

ACS Omega

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The influence of the acid sites in the hydrodeoxygenation of anisole performed over Ni catalysts supported on SBA-15 modified with metal oxides (Ni/M-SBA-15, M = Ti, Zr, Al, or Nb) was demonstrated. Catalysts were characterized by SEM–EDX, nitrogen physisorption, XRD, UV–visible DRS, TPR, TPD of ammonia, IR-Py, O2 chemisorption, and high-resolution transmission electron microscopy. The mesoporous structure and the hexagonal arrangement of the supports were maintained in the catalysts. Ni catalysts supported on modified M-SBA-15 exhibited a higher metal-support interaction, an increase in the acidity and, as a consequence, improved selectivity to cyclohexane. The deoxygenation reaction rate constants increased as Ni/SBA-15 < Ni/Ti-SBA-15 < Ni/Nb-SBA-15 < Ni/Zr-SBA-15 < Ni/Al-SBA-15, which is attributed to the increase in the amount and strength of acid sites, especially of the Brønsted ones, which promotes the cleavage of the C–O bond. It is also important to keep the metal/acid sites together to obtain high activity and selectivity to hydrodeoxygenated products.

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Tuning of activity and selectivity of Ni/(Al)SBA-15 catalysts in naphthalene hydrogenation

Cited by 19 publications

References 40 publications

Deep Hydrogenation Saturation of Naphthalene Facilitated by Enhanced Adsorption of the Reactants on Micro‐Mesoporous Pd/HY

Deep Hydrogenation Saturation of Naphthalene Facilitated by Enhanced Adsorption of the Reactants on Micro‐Mesoporous Pd/HY

Effect of the Gallium and Vanadium on the Dibenzothiophene Hydrodesulfurization and Naphthalene Hydrogenation Activities Using Sulfided NiMo-V2O5/Al2O3-Ga2O3

Boosting the Hydrodeoxygenation Activity and Selectivity of Ni/(M)-SBA-15 Catalysts by Chemical Alteration of the Support

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